Obviously a hypothetical scenario. There is no way to pass on the knowledge to anyone else. Time freezes for you only, and once you have your answer you are out of this world.
The question can allow you to see into the past, present and future and gain comprehension of any topic/issue. But it’s only one question.
What would you want to know? Personally I’d want to see a timelapse or milestone glimpses of humanity’s future until the end of Earth’s existence (if we survive that long)
By what mechanism did the universe come to be, or if it simply always existed, why does it exist in this particular way with these particular laws?
I was going to say “are we in a simulation” but this would work too.